Non-invasive ophthalmic imaging of adult zebrafish eye using
... We describe the development of a single-mode fibre based optical coherence tomography set-up and its use for non-invasive optical imaging of adult zebrafish (Danio rerio) eyes. The free-space axial and lateral resolutions of the set-up were estimated to be ~ 11 and 17 µm respectively. Images of whol ...
... We describe the development of a single-mode fibre based optical coherence tomography set-up and its use for non-invasive optical imaging of adult zebrafish (Danio rerio) eyes. The free-space axial and lateral resolutions of the set-up were estimated to be ~ 11 and 17 µm respectively. Images of whol ...
Physical Optics - Haverford College
... so it reforms into an image of the diffraction grating. We will see shortly how this simple experiment can be used to understand how imaging works from a wave perspective. First, let’s recall how periodic waves are represented. Most of us are familiar with repetitions in time, such as periodic oscil ...
... so it reforms into an image of the diffraction grating. We will see shortly how this simple experiment can be used to understand how imaging works from a wave perspective. First, let’s recall how periodic waves are represented. Most of us are familiar with repetitions in time, such as periodic oscil ...
Reflection-mode scanning near-field optical microscopy: Influence
... a gross simplification as ray optics do not hold on to such a small scale, but this is nonetheless an intuitive way of explaining the results and is consistent with our observations on numerous samples, ~3! there will be variations in reflectivity across the sample, due to the different angles of in ...
... a gross simplification as ray optics do not hold on to such a small scale, but this is nonetheless an intuitive way of explaining the results and is consistent with our observations on numerous samples, ~3! there will be variations in reflectivity across the sample, due to the different angles of in ...
University of Groningen CURVATURE MEASUREMENT
... et al. (1964, p. 223) found quite different values for R. However, re-evaluating their exemplary case with Eq. 1 yields a very satisfactory linear fit. Our results thus show that instead of factoring out the phase parameter p (Eq. 1) it is a much better approach to make a direct, linear fit to the s ...
... et al. (1964, p. 223) found quite different values for R. However, re-evaluating their exemplary case with Eq. 1 yields a very satisfactory linear fit. Our results thus show that instead of factoring out the phase parameter p (Eq. 1) it is a much better approach to make a direct, linear fit to the s ...
Introduction to Inverse Problems
... • The object is a “continuous” function (amplitude or intensity) assuming quantum mechanical effects are at sub-nanometer scales, i.e. much smaller than the scales of interest (100nm or more) – i.e. the object dimension is uncountably infinite • The measurement is “discrete,” therefore countable and ...
... • The object is a “continuous” function (amplitude or intensity) assuming quantum mechanical effects are at sub-nanometer scales, i.e. much smaller than the scales of interest (100nm or more) – i.e. the object dimension is uncountably infinite • The measurement is “discrete,” therefore countable and ...
Daily Quizzes for Laser Technology
... another name for the diameter of the lens the distance from the lens to the point at which all the rays converge ...
... another name for the diameter of the lens the distance from the lens to the point at which all the rays converge ...
Partially Coherent Image Formation Theory for X
... can be eliminated. Note that similar constraints can also be found in the derivation of generalized Van Cittert-Zernike theorem. Specifically, the propagation distance z needs to be greater than 4ξ∆ξ/λ and 4η∆η/λ where ξ = (ξ1 + ξ2 ) /2, η = (η1 + η2 ) /2, ∆ξ = ξ2 − ξ1 , and ∆η = η2 − η1 [20], in or ...
... can be eliminated. Note that similar constraints can also be found in the derivation of generalized Van Cittert-Zernike theorem. Specifically, the propagation distance z needs to be greater than 4ξ∆ξ/λ and 4η∆η/λ where ξ = (ξ1 + ξ2 ) /2, η = (η1 + η2 ) /2, ∆ξ = ξ2 − ξ1 , and ∆η = η2 − η1 [20], in or ...
Refraction
... Since light can retrace it's path it is found that if light is to enter water from air and arrive at a point below the surface only light within a radius r can reach that point below the surface. This is because any light from the point below the surface that has an angle of incidence greater that t ...
... Since light can retrace it's path it is found that if light is to enter water from air and arrive at a point below the surface only light within a radius r can reach that point below the surface. This is because any light from the point below the surface that has an angle of incidence greater that t ...
Microscopes - Photonics Research Group
... in the image plane. The sum of the two diffraction images, assuming the two points of light were mutually incoherent, appears as in Fig. 7a . As d becomes smaller so that the first minimum of one diffraction image overlaps with the central maximum of the neighboring diffraction image (d 5 rAiry, Fig ...
... in the image plane. The sum of the two diffraction images, assuming the two points of light were mutually incoherent, appears as in Fig. 7a . As d becomes smaller so that the first minimum of one diffraction image overlaps with the central maximum of the neighboring diffraction image (d 5 rAiry, Fig ...
Ch30
... examined by another lens, called the eyepiece, used as a magnifying glass. The eyepiece is positioned so that the image produced by the first lens is within one focal length of the eyepiece. The eyepiece forms an enlarged virtual image of the real image. ...
... examined by another lens, called the eyepiece, used as a magnifying glass. The eyepiece is positioned so that the image produced by the first lens is within one focal length of the eyepiece. The eyepiece forms an enlarged virtual image of the real image. ...
219_cha.pdf
... importance in automated manufacturing, quality control of components, robotics and modeling application. Several optical surface contouring methods interferometry, light scattering, speckle photography, moiré, Talbot interferometry and holography etc. have been developed [1-9]. Optical surface conto ...
... importance in automated manufacturing, quality control of components, robotics and modeling application. Several optical surface contouring methods interferometry, light scattering, speckle photography, moiré, Talbot interferometry and holography etc. have been developed [1-9]. Optical surface conto ...
CODE Subject name INTRODUCTION LEARNING OUTCOMES
... theory, waveguide modes and reflection from discontinuities is covered. Numerical methods used to simulate optical devices are discussed. Commercial software such as Comsol and FDTD program would be introduced for electromagnetics modeling. The course gives a number of home assignments and computer ...
... theory, waveguide modes and reflection from discontinuities is covered. Numerical methods used to simulate optical devices are discussed. Commercial software such as Comsol and FDTD program would be introduced for electromagnetics modeling. The course gives a number of home assignments and computer ...
File - Electrical Engineering
... In a short interval of time each end of the wavefront would move forward a set distance. If we look at a single ray of light moving through a clear material the distance advanced by the wavefront would be quite regular.There is a widely held view that light always travels at the same speed. Th ...
... In a short interval of time each end of the wavefront would move forward a set distance. If we look at a single ray of light moving through a clear material the distance advanced by the wavefront would be quite regular.There is a widely held view that light always travels at the same speed. Th ...
MICROSCOPY
... do this the tissue is passed through a 'transition solvent' such as epoxy propane and then infiltrated with a resin ...
... do this the tissue is passed through a 'transition solvent' such as epoxy propane and then infiltrated with a resin ...
Using Transmission Electron Microscopy (TEM) for Chemical
... be considered purely incoherent, which bypasses the phase problem that complicates interpretation of conventional high-resolution TEM using phase contrast imaging. High-angle annular dark field (HAADF) imaging is often referred to as Z-contrast imaging because of the atomic number dependence of the ...
... be considered purely incoherent, which bypasses the phase problem that complicates interpretation of conventional high-resolution TEM using phase contrast imaging. High-angle annular dark field (HAADF) imaging is often referred to as Z-contrast imaging because of the atomic number dependence of the ...
principles of recording image-matrix holographic stereogram
... phenomenon of parallax. When you look at an object, you see only the front side. When you move your head to one side you see the front and another side of the object. This is also very important in holography and constitutes the most common difference between photography and holography. When you are ...
... phenomenon of parallax. When you look at an object, you see only the front side. When you move your head to one side you see the front and another side of the object. This is also very important in holography and constitutes the most common difference between photography and holography. When you are ...
Flanged Sample Compartment Flanged Beam Splitter Holder
... beam splitter, up to 0.25 inch (6 mm) thick, at a 45° angle. Since it can be coupled directly to Oriel light sources, monochromators, and detectors via the 1.5 Inch Series flanges, it is a convenient device for splitting a beam in an enclosed optical system. The 78150 has two lens holders for 1.5 in ...
... beam splitter, up to 0.25 inch (6 mm) thick, at a 45° angle. Since it can be coupled directly to Oriel light sources, monochromators, and detectors via the 1.5 Inch Series flanges, it is a convenient device for splitting a beam in an enclosed optical system. The 78150 has two lens holders for 1.5 in ...
Optical aberration
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An optical aberration is a departure of the performance of an optical system from the predictions of paraxial optics. In an imaging system, it occurs when light from one point of an object does not converge into (or does not diverge from) a single point after transmission through the system. Aberrations occur because the simple paraxial theory is not a completely accurate model of the effect of an optical system on light, rather than due to flaws in the optical elements.Aberration leads to blurring of the image produced by an image-forming optical system. Makers of optical instruments need to correct optical systems to compensate for aberration.The articles on reflection, refraction and caustics discuss the general features of reflected and refracted rays.